TY - T1 - The Effect of Helium Emissions by a Superconducting Gravimeter on the Rubidium Frequency Standards of Absolute Gravimeters SN - / UR - http://hdl.handle.net/10138/224767 T3 - A1 - Mäkinen, J; Virtanen, H; Bilker-Koivula, M; Ruotsalainen, H; Näränen, J; Raja-Halli, A A2 - PB - Springer Science $$ Business Media Y1 - 2015 LA - en AB - ... VO - IS - SP - OP - KW - N1 - PP - ER -